Extraction apparatus



(No-Modem l f s, W, COCHRAN; A

EXTRAGTION' APPARATUS.

Patented 0011.3, 1893.

l l l lill IM' IIII l l I UNITED STATES PATENT OFFICE.

SAMUEL W. COCHRAN, OE LAMBERTVILLE, NEV JERSEY.

EXTRACTION APPARATUS.

SPECIFICATION forming part of Letters Patent No. 505,816, dated October3, 1893.

Application led April 13, 1893. Serial No. l170,180. (No model.)

To all whom t may concern.;

Be it known that I, SAMUEL W. COCHRAN, a citizen of the United States,residing at Lam-` bertville,in the county of Hunterdon and State of NewJersey, vhave invented a new and useful Extractip Apparatus, of whichthe fol` lowing is a speeilication.

This invention relates to extraction apparatus; and it has for itsobject to provide an improved apparatus of this character employed forcontinuous hot percolation in exhausting drugs or other substances oftheir soluble constituents or active principles.

To this end the main and primary object of the present invention is tosimplify and improve the construction ol' extraction or percolatingapparatus of this character, so that the same will not only be availablefor use on a small scale, but will be well adapted for manufacturingsolutions on a large scale.

.With these and other objects in view which will readily appear as thenature of the in" v ention is better understood, the same consists inthe novel construction, combination and arrangement of parts hereinaftermore fully described, illustrated and claimed. In the accompanyingdrawingsz-Figure l 1s a perspective View of an extraction apparatusconstructed in accordance with this invention. Fig. 2 is an enlargedcentral vertical sectional view of the same. Fig. 3 is a transversesectional view on the line -x of Fig. 2.

Referring to the accompanying drawings, A represents a percolatorcylinder or vessel made in suitable size and shape according to thescale onwhich the solution is to be manufactured. The said cylinder orvessel A, is designed to contain a suitable quantity of the drug orsubstance which is to be treated by the percolation process in order toexhaust the same o f its active principle, and the stratum of drug whichmay be designated as B, is supported on the screen plate C, arranged atthe bottom of the cylinder A, directly over the bottom outlet D, inorder to prevent the drug from clogging up said outlet, while at thesame time serving as a strainer for straining the liquid, which passesout of the bottom outletD, and through the outlet pipe E, to a pointnear the bottom ot the boiler F, into which the pipe E, projects. Asstated, the

outlet pipe E, from the bottom of the percolator A, is led into theboiler C, to a point in close proximity to its bcttom,so that the liquidpassinginto the boiler will be completely taken up by the meustruumliquid G,which is placed within `the boiler'F, and is of course theproper liquid or chemical for extracting the desired element from theparticular drug or substance contained in the percolator. The boiler F,is located in any convenient position so that the same can be heated byany suitable device, in order to vaporizethe liquid contained within thesame, and drive it through the circulating vapor tube H, into the top ofthe percolator A. i The circulating tube H, which leads the vapor fromthe liquid G, into the top of the percolator A, connects with saidpercolator near its upper open end, and said upper open end of thepercolator cylinder, is surrounded by the annular flange l,

which forms a joint groove J, adapted to receive the lower edge of theupper condenser box K, removably supported in position on top ofthe'cylinder A. The condenser box K, is preferably constructed in acylindrical shape and is provided with a lower projecting edge adaptedto fit into the groove J, and is jointed with the cylinder A, in suchgroove, by a water joint, by luting, or other suitable means, so as tomake the percolator perfectly vapor-tight. The said condenser box K, isprovided with an inwardly extending series of condenser tubes L, whichproject through the bottom of the box and have lower open ends Z,communicating with the interior of the percolator cylinder A, while theupper ends ot' the tubes project to a point near the top ot the box, inorder to allow the same to be entirely surrounded by cold water, whichis placed within the condenser box. The condenser box K, maybe readilyfilled with water through the filling tube M, passing through the top ofthe same and projecting to a point near its bottom, and the water may bechanged byallowing it to run out ofthe overliow pipe N, connected withthe same near its top, so that after the box is full of water, it willflow out when more is added through the lling pipe. VA valved drain pipe0, is connected to the condenser box near its lower end to provide fordraining the same when necessary.

Now from the foregoing it is thought that the construction and operationof .the herein described extraction apparatus will be readily apparent.It will be clear, that as the vaporized liquid passes from the tube H,into the percolator cylinder A, such vapor will rise up into thecondenser tubes L, and will beimmediately condensed, so that thecondensed Vapor will fall with a uniform distribution upon the surfaceof the material in the cylinder A, will then percolate Vthrough suchmaterial and flow through the pipe E, back into the boiler F, where itwill be revaporized, and

so on until the substance is exhausted and the process completed. It maybe also well to observe at this point that by properly regulating thenumber of condensing tubes and the intervals between them, a uniformdistribution of the condensed liquid is secured over the whole surfaceof the material through which such liquid is to percolate.

Changes in the form, proportion and the minor details of construction asembraced within the scope of the appended claims may be resorted towithout departing from the principle or sacrificing any of theadvantages of this invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In an extraction apparatus, the combination of a percolator cylinderor vessel having an open upper end, an adjacent boilerin circulationwith said cylinder or vessel, and a condenser fitted over the open upperend of the percolator cylinder or vessel and having condenser tubesopening at their lower ends into the cylinder or vessel, substantiallyas set forth.

2. In an extraction apparatus, a percolator cylinder having a bottomoutlet, an adjacent boiler, an outlet pipe leading from the bottomoutlet ofthe cylinder to a point near the bottom of the boiler, acirculating or vapor tube leading from the top of the boiler to a pointnear the top of the percolator cylinder, and a condenser removablyarranged at the top of said percolator cylinderl and communicatingtherewith,substantially as set forth.

3. In an extraction apparatus, the combination of a percolator cylinderhaving a strainer plate at its bottom to support the drug, an adjacentboiler connected with said percolator cylinder at its top and bottom,and a condenser removably inclosing the open 'upper end of saidpercolator cylinder and having a series of condenser tubes opening attheir lower ends into the percolator cylinder, substantially as setforth.

4. In an extraction apparatus, a percolator cylinder having an annularjoint groove at its open upper end, an adjacent boiler connected withsaid cylinder at its top and bottom, and a condenser having a lowerprojecting edge adapted to be sealed in said joint groove of thepercolator cylinder, and a series of condenser tubes opening attheirlower endsinto said cylinder, substantially as set forth.

5. In an extraction apparatus, the combination with apercolatorcylinder; of acondenser c

